code: def backend_info(self):
      return {
          "name": self.name,
          "socket": self._vineyard_socket,
          "instance_id": self._client.instance_id,
      }
  
imports: import asyncio
  from io import UnsupportedOperation
  import logging
  import sys
  from typing import Dict, List, Optional, Tuple
  from ..lib import sparse
  from ..resource import virtual_memory
  from ..utils import implements, lazy_import, calc_size_by_str
  from .base import StorageBackend, StorageLevel, ObjectInfo, register_storage_backend
  from .core import BufferWrappedFileObject, StorageFileObject
label_desc: Use image node_id 4 for calling the VineyardStorage obj's underlying member method code with example usage: obj.backend_info() and returns: dict